Improved saw-filing machine



UNITED STATES PATENT OEEIcEo JOHN W. H. DOUBLER, OF CHICAGO, ILLINOIS.

IMP-ROVED SAW-FILING MACHINE.

Specification forming part of Letters Patent No. 59, v193, dated October 30, 1866.

To all whom it may concern:

Be it known that I, J oHN W. H. DOUBLER, of. the city of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Machines for Filing Saws; and I do hereby declare that the following` is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters and gures marked thereon, which form part of this specifioation.

The nature of my said invention consists in a novel mechanism whereby saws may be readily and accurately filed, and whereby the,

stand how to construct and use my invention,

I will proceed to describe the same with particularity, making reference in so doing to the aforesaid drawings, in which- Figure l represents a plan or top view of my invention; Fig. 2, a side view of thesame, and Fig. 3 is a sectional view taken at the line x in Fig. l.

Similar letters of reference in the several iigures indicate the same parts of my invention.

A represents two sills or bars, upon which the machine is placed and rmly secured, being provided at each end with holes, whereby the machine may be securely and rmly fixed in any required position. B and C represent two suitable timbers or supports fastened securely to said sills A. D I) are vertical standards attached to the frame B, near each end, which may be of iron or wood, as preferred, to the upper ends of which are attached the saw-holder E E, as shown. r

Upon one of the jaws for holding the saw there is arranged or attached a toothed rack, as shown. (Marked F.)

The parts already mentioned and described constitute the stationary frame ofthe machine, upon which the remaining parts have a longitudinal reciprocating motion, as hereinafter specified, while the tile-holder and its attachby means of three standards, Q, one at each end and one at the center, which standards are provided with a projecting lip or rest, q,

which enters a grooved support, R, upon the xed saw-holder E, as shown, thus suspending the platform upon said rest It, while it may have a free reciprocating movement in said groove. Thus it is readily seen that the platform P,with its attachments, has a free longitudinal reciprocating motion upon the frame of the machine. The object of this movement is to move the file along upon the saw as the filing progresses, which is necessary, inasmuch as thesaw itself is secured in a stationary holder or clamp.

The gradual and uniform movement is effected as follows,the le being attached, as hereinafter mentioned, or supported upon the said platform P:

O O represent two posts or uprights attached to the platform, to form bearings for the shaft G and for the axle of the wheel J, the opposite end of the shaft Gr being supported upon the central vstandard Q, hereinbefore men-- tioned. Upon said shaft G is the screw or worm H, which engages with the teeth of the rack F, and also the friction or gearwheel I, opposite the wheel J, and in contact with it.

L represents two arms moving `upon the shaft of the wheel J, one arranged upon each side of the wheel, and uniting in one beyond A the perimeter of the wheel, and having a handle, K,vattach'ed thereto, as shown. Between said arms L there is arranged, as shown, a catch, M, which is held down upon the teeth of the wheel J by the action of the spring m. Thus by taking the handle K, when in the position shown in Fig. 2, and drawing it back, the wheel J is revolved, and by its contact with the wheel I the shaft G and screw H are also revolved, thus moving the platform P and its attachments, including the iile, along a distance proportioned to the arc described by the arms L.

To properly adjust and regulate the dis'-` tance which the platform shall move at each movement of thewheel J, the slotted arc Nis centered upon the shaft of J, and adjusted upon the arm L by means of the set-screw a.

It will readily be seen that this arc may be adjusted upon the arm L so that avery slight movement of the arm shall bring the `heel of the are upon the pin o and check the movement and revolution of J, or it may be so adjusted as to permit the arms L to describe or move over a large arc before being stopped by said pin o, thus giving any required movement to the platform, according to the size of the saw-teeth.

From the direction in which the teeth ori indentations in the periphery of the wheel J are cut, it will be observed that the back movement of the arms L does not revolve the Wheel J nor the shaft G, and hence the platform is stationary during said back movement.

The mechanism for operating the file consists in the guide T, which is pivoted at its front end to the top of the central standard Q, hereinbefore mentioned, giving said guide l movement of the guide T about the pivot at its front end the iile may be moved at any required angle with the saw, thus adapting the machine to all kinds of saws as well as all slzes.

The guide T is provided upon each side with slots t, through which the ends of the crossbar upon the rear end of the file-carrier project, one end entering a groove, u, in the eccentric wheel V, which has its shaft at W, and is provided with a handle or crank, V'. The said wheel has its bearings upon the rear end of the guide T and upon a suitable standard upon the opposite side of the wheel erected upon the platform P. Thus it will,be seen that by turning the crank V and the wheel V a sliding reciprocating motion is given to t file-carrier in the guide T.

The file-carrier consists of three pieces, a, c,

i and d. The file-carrier or main part ofthe same, marked a, rests upon a cross-bar, marked c, whose ends are supported in and move in an endless groove or path in the sides of the guide, marked a. The said part a is held-or kept down upon the bar c by means of the bolt f, which passes through them and the spring g upon said bolt, arranged as shown.

d represents a block, which has a round plug upon its rear end which its into a correspond- 'ing socket in the end of a, where it is secured by means of a thumb-screw, as shown. The block d has a triangular socketlto receive the file, which is secured by a thumb-screw in like manner. By means of the round block d and socket it may be adjusted with great nicety, so as to arrange the file-edge at any required angle or position.

The spring f keeps the le,down upon the saw when the machine is in operation, and at the same time allows it to yield as occasion may require. v

As the file is moved forward to give the filing thrust, just as it is completed the spring 7b presses against the shoulder and raises up the file and file-holder, sov that in drawing back the le it does not come in contact with the saw, in which operation the aforesaid block c moves in said endless groove a in the direction of the arrows, the file-holder being held up by the spring h until the block c rests upon the bar b, which keepsup the file-holder until the end of the le is drawn back from the saw, when the file-holder drops from the rear end of the bar b into the' lower groove, in which its forward movement is made.v

When the saw has been properly'anged in the jawsE, and the slotted arcN so adjusted, as aforesaid, as to properlyr gage the machine to the saw, the operation ofthe machine is as follows, care being first taken, however, to adjust the file-guide to the proper angle with the saw, and the saw in such a manner and position that the file shall be at one end:

The crank and wheel V' V is turned so as to give the filing stroke and return movement to the le, when, with the left hand, the arm L is drawn forward until the arc strikes upon the pin o, as aforesaid, which moves the Ille along to the next indentation in the saw, when the WheelVis again turned, as before, and so on until the saw is finished.

By loosening the screw-clamp U, the guide may be moved around at any required angle upon the platforms, the radial lines drawn thereupon and a suitable groove or point upon the plate s enabling the adjustment to be made with ease and precision.

If preferred, both the wheels I and J herein mentioned may have cog-gearing upon their circumferences, in which case the ratchet-teeth now upon the circumference of J, into which the dogM engages, might be arranged upon one side of the wheel.

The lower ends of the pendants Q project into a groove' in the frame B, as shown, to prevent any lateral play to the parts supporting the iling mechanism, all vertical disarrangement or displacement being prevented by the rest R acting upon the shoulder on Q, just beneath said rest B.

Having 4described the construction and operation of my invention, I will now proceed to describe and specify what I claim and desire to secure by Letters Patent:

l. The combination and arrangement of the stationary jaws E, u stationaryraok, F, lerangement of the movable slotted are N and guide T and holder a, Wheel V', shaft; G, and pin or stop o, as and for the purposes desorew H, as and for the purposes specified. scribed and set forth.

2. The combination ofthe Wheels J I spring- 1 catch M, arms L, shaft G, and screWH with JOHN H' DOUBLER the stationary ruck F, substantially as and Witnesses: for the purposes set forth. W. E. MANS,

3. In combination with the arm L, the ar- D. A. CASHMAN. 

